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Evaluation of the cartilaginous acetabulum by magnetic resonance imaging in developmental dysplasia of the hip

Takeuchi, Ryokoa; Kamada, Hiroshib; Mishima, Hajimeb; Mukai, Naokic; Miyakawa, Shumpeic; Ochiai, Naoyukid

Journal of Pediatric Orthopaedics B: May 2014 - Volume 23 - Issue 3 - p 237–243
doi: 10.1097/BPB.0000000000000032

MRI findings for 51 hips in 45 pediatric patients (mean age 2.3 years; range, 1.1–4.1 years) with suspected acetabular dysplasia or residual subluxations were analyzed retrospectively. We attempted to predict the growth of osseous acetabulum and future acetabular coverage on MRI performed at 2 years of age. The cut-off value of the cartilaginous angle was 18° for the cartilage acetabular index and 13° for the cartilage center edge angle. However, follow-up assessments to monitor the progress of changes in the congruity between femoral head and acetabular development are important.

aDepartment of Orthopaedic Surgery, Graduate School of Comprehensive Human Science

bDepartment of Orthopaedic Surgery, Faculty of Medicine

cFaculty of Health and Sport Science, University of Tsukuba, Ibaraki

dDepartment of Orthopaedic Surgery, Kikkoman General Hospital, Chiba, Japan

Correspondence to Ryoko Takeuchi, MD, Department of Orthopaedic Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan Tel: +81 29 853 3219; fax: +81 29 853 3214; e-mail:

© 2014 by Lippincott Williams & Wilkins, Inc.